Brush drilling and grooving machine



June 26, 1934. J, HOLMES BRUSH DRILLING AND GROOVING momma Filed July 13. 1932 9 Sheets-Sheet l June 26, 1934. J HOLMES BRUSH DRILLING AND GRQOVING MACHINE Filed July 13, 1932 9 Sheets-Sheet 2 NM emfi QQ mm 8w 0 3 w: 3 Q8 3 hi on 0 Q .03 Q Q m3 Q & mg n t 8m w. 6 Q N Q\\\ RN O 0' MN an mm am 0 w .3 S Q mww a w NM NNN. 9m *NN MNN 4 m muw W a W ON \NNQ Q Q Q 1 m5 June 26, 1934. J. Q. HOLMES BRUSH DRILLING AND GROOVING MACHINE 9 Sheets-Sheet 3 Filed July 13, 1932 m v LN.

June 26, 1934. HOLMES BRUSH DRILLING AND GRoovING MACHINE Filed July 13, 1932 9 Sheets-Sheet 4 a awe/MW J. Q. HOLMES 1,964,435

BRUSH DRILLING AND GROOVING MACHINE Filed July 13, 1932 9 Sheets-Sheet s June 26, 1934.

BRUSH DRILLING AND GROOVING MACHINE Filed July 13, 1932 9 Sheets-Sheet 6 m w m 6&4 mu m mdvw \ww u u QNN O m 0 i V W: in N3 mwwN June 26, 1934. J HQLMES BRUSH DRILLING AND GROOVING MACHINE Filed July 13, 1932 9 Sheets-Sheet 7 June 26, 1934. J HOLMES BRUSH DRILLING AND GROOVING MACHINE Filed July 13, 1932 9 Sheets-Sheet 8 3 noeydoz June 26, 1934. J. HOLMES 1,964,435

BRUSH DRILLING AND GROOVING MACHINE Filed July 13, 1932 9 Sheets-Sheet 9 W NRWN a Patented June 26, 1934 PATENT OFFICE BRUSH DRILLING AND GROOVING MACHINE John'Q. Holmes, Anderson, Ind, assignor, by

mesne assignments, to General Motors Corporation, Detroit, Mich.,

ware

a corporation of Dela- Application July 13, 1932, Serial No. 622,189

92 Claims.

This invention relates to the manufacture of commutator brushes.

It is among the objects of the present invention to stamp a trade-mark'on a commutator brush.

Anotherobject of the present invention is to cut into a commutator brush a groove which is adapted to receive a conductor.

Another object of the present invention is to drill through a commutator brush a hole-which is adaptedto-receive the free end of the conductor locatedin the groove of'the commutator brush.

Another-object of the present invention is to provide-a machine which performs upon a commutator brush one or more of the abovementioned operations.

Still another object of the present invention is todivide the drilling operation into part op 'erations for reducing the wearing of the drillto-a minimum.

Further objects and advantages of the pres ent invention will be apparent from: the following description, reference'being had to the accompanying-drawings wherein a preferred em-- bodiment of one form ofthe present invention is clearly shown.

In the drawings:

Fig. 1 is a perspective View of a generator brush after the various operations have been performed thereon.

Fig. 2 is" a perspective view of the machine embodying the present invention.

Fig. 3 is another perspective view of the same.

tain'parts shown in section.

Fig. 5-is afro'nt elevation 'of themachine, showing-'one-saw carrying frame in section.

Fig. 6 is also a front elevation with certain parts omitted for better disclosure of hidden mechanisms.

Fig. 7 is a sectional view taken on the line 77 of Fig.- 6. t

Fig. 8 is a view'similar to Fig. 6, disclosing r however, more distinctly the stamping mechanism.

Fig. 8a is a fragmentary sectional view taken Fig. 4 is a top 'view of the machine with cera substantially U-shaped main bracket 21 whichis mounted thereon by angles 22. A reinforcing rib 23 connects the parallel legs 24 of the U- bracket 21. On this U-bracket are supported various mechanismsadapted to perform various operations on a generator brush. These mechanisms shall now be detailedly described in the order in which they perform their operation. These mechanisms in their mentioned order'are a brush indexing mechanism A, a brush stamping mechanism B,- a brush-drilling mechanism- C- and a brush grooving mechanism 'D, allof whichare indicated by like letters in the drawings.

Brush indexing mechanism A Referring more particularly to Figs. 2, 4 and 8, two vertical chutes 30 and 31 are shown spaced from each other and secured to the yoke portion 25 of the main-bracket 21 in any suitablemanner. In both of these chutes there arestoreda--plurality of brushes 35 with their surfaces 36 resting on the surfaces 37 of the next lowermost brushes. For reasons which will appear obvious later it is necessary that the beveled surfaces 35a of the brushes come to lie adjacent the walls 30a and 31a of 'the chutes 30 and 31' respectively. The lowermost brushes in the chutes either rest on the top surfaces 38 of ejector bars 39 which are re-. ciprocable in a rectangular groove40 provided by the yoke portion 25 of the main bracket 21, or on the bottom surface 41 of said groove 40, depending upon the position of theejector bars relative to the chutes. From this follows that the lowermost brush in each chute may freely drop into the groove 40 if the ejector bars do not obstruct the chutes. Plates 42 and 43 overlie groove 40 thus retaining the ejector bars within the groove. During a reciprocation of the ejector bars the sameadvance first in the direction of arrows 4.4 and 45 in Fig. 8 and each push a brush- 35 which previously has dropped-from-a chute into the groove 40, from beneath the chutes into position a as indicated in Fig. 8. During such" movement of the two brushes into positiono it is obvious that a plurality of previously moved brushes such as 351) are alsopushed forwardly in the directionof the arrows for a distance equal to the length of the brush which can be readily understood. Plates 42a and 43a overlie groove 40- and retain the brushes 35b within said groove. lhe foremostbrushes 35c-ingroove 40 are finally pushed intoinclined-chutes 46 and 47 on which" they'slide into suitable receptacles. The ejector bars 39 are intermittently reciprocated'and'the'ir reciprocation is so timed that various operations to be described later may be performed on brushes while resting in position a.

The mechanism for concurrently reciprocating both ejector bars 39 will now be described detailedly. Referring particularly to Figs. 3, 8 and 9 the armature shaft of a motor (not shown) underneath the table 20 carries a pulley 51 which through a belt connection 52 drives another pulley 53 which is keyed to the fast rotating shaft 54 of any suitable gear reduction 55 which is mounted on the table. The speed reduced shaft 56 of reduction gearing 55 is drivingly connected with a main cam shaft 57 by a flanged coupling 58. This cam shaft is rotatably supported in taper roller bearings 59 and 60, located and held against longitudinal movement by yokes 61 and 62, respectively, of a bracket 63 which rests on rectangular bars 64 and 65 (see Fig. 8) attached to the parallel legs 24 of the main bracket 21 in any suitable manner. Longitudinal movement of the camshaft is prevented by a collar 59a integral with the camshaft and abu ting taper roller bearing 59, and a collar 60a threaded over the camshaft and abutting the other taper roller bearing 60. Bracket 63 provides flanges 66 and 67 which are secured to the legs 24 of the main bracket 21 by screws 68. Screws 68a furthermore hold bracket 63 on the supporting bars 64 and 65. The free end of the camshaft extends through an aperture 25a in the yoke 25 of the main bracket 21. Camshaft 57 has keyed thereto as at 69, a camplate 70 which is located in the aperture 25a and which cooperates with an antifriction roller 71, carried by a pin 72 which in turn is carried by a rectangular block 73 slidable in a corresponding slot 74 in the yoke 25 of main bracket 21. Plates 75 and 76 secured to said yoke portion by screws 77 retain the roller carrying block 73 within slot 74. A spring '78, interposed between the yoke portion 25 of the main frame and block 73 and located in aligning recesses 79 and 80 respectively thereof,

urges the roller 71 into constant engagement with camplate 70. Two bell crank levers 81 and 82 are pivoted as at 83 and 84 respectively, to the yoke 25 of the main bracket, and are also pivotally connected as at 85 and 86 respectively, with pin 72. The free arms of the bell crank levers 81 and 82 are provided with rectangular slots 87 and 88 respectively, which slidably receive square blocks 89 and 90 respectively, pivoted to lugs 93 and 94 respectively, of the ejector bars 39. It will ,be understood from the foregoing that during one rotation of the camplate 70 both of the ejector bars 39 are reciprocated once.

Brush stamping mechanism B This mechanism is adapted to stamp a trademark B1 on the surface 37 of a brush 35 (see Fig. 1). As the double acting machine comprises two stamping mechanism which are exactly alike only one of them in connection with a common actuating means will be described. As best disshank 102 of the staniper and interposed between a shoulder 104 of the stamper and the bracket 103 is a heavy spring 105. This spring urges the stamper toward the brush in position a while a plurality of nuts 106, received by the end of shank 102 maintain the stamper 190 in a desired position relative to the brush. As the image on the Stamper is elevated, the brush has to be slightly lifted under power from the bottom surface of groove 40 in order to receive the image. For this purpose there is provided a plunger 107 which is slidable in a bushing 108 provided by the yoke 25 of the main bracket. The lower end of the plunger 107 is secured to a pivot head 109 by a wedge 110 which is locked in position and may be ad justed by the head 111 of a screw 112 which is threaded into said head. Pivot head 109 which is moved in unison with plunger 107 is pivoted at 113 to a link 114 which is also pivoted at 115 to a bar 116 which carries an antifriction roller 117 cooperating with a cam-plate 118 which is keyed to camshaft 57 together with camplate 70 as appears in Fig. 9. Also pivoted at 115 to the link 114 and the bar 116 is another link 119 which is also pivotally mounted as at 120 to the main frame 21. Bar 116 which is also pivoted to the corresponding links 114a and 119a of the undescribed stamping mechanism receives one end of a spring 122 the other end of which is secured to a bracket 123, attached to the main frame 21 by a screw 124. Spring 122 urges the bar toward the left as viewed in Fig. 8, thus maintaining the cam roller 117 in firm engagement with the camplate 118. In the position shown in Fig. 8 the cam roller 117 is still cooperating with the lobe portion of camplate 118 and the links 114 and. 119 as well as 114a and 119a are in a position in which plungers 107 and 107a are still retracted from the brushes in position (2. Upon continued movement of camplate 118 from the position in Fig. 8

in counterclockwise direction, the concentric portion of said camplate will finally move into contact with the cam roller 117 which results in an axial aligning of the links 114, 119 and 114a, 119a under the action of spring 122. Since links 119 and 119a are pivotally mounted with respect to the main bracket 21, the links 114 and 114a impart the entire resulting vertical movement to the plungers 107 and 107a which then move toward the brushes in position a and slightly raise the same into operative engagement with the stampers 100 and 100a. It is apparent that during a longitudinal movement of the bar 116 the same describes a slight lateral movement due to its pivot connection with pivotally mounted links to avoid interference between bar 116 and camshaft 57.

Brush drilling mechanism C This mechanism is adapted to drill a hole C1 through a brush 35 (see Fig. 1)

Referring to Figs. 3, 4, 7, 9 and 10, the brush retaining plates 42a and 43a provide each a bushing adapted to guide a drill 131 toward or away from a brush while resting in position a. As the drill rotating means for both drills are exactly alike only one of them will be d scribed detailedly.

The drill 131 is carried by a chuck 132 provided by a spindle 133 which is rotatably but not axially movably supported by a quill 134. which is longitudinally adjustable within a split bracket 135 wherein the quill may be clamped in adjusted position by screws 135a. The spindle 133 terminates into a pulley 136 which is drivingly connected with a pulley 137 of an electric motor 138 through a belt connection 139. As best shown in Fig. this belt connection is also adapted to drive the pulley 136a of the corresponding undescribed drill spindle 133a. The motor 138 as well as the quill carrying bracket 135 and corresponding bracket 1355 are mounted on a platform 149. A pair of brackets 141 and 142 which are also mounted in any suitable manner on the platform 149 adjustably carry belt tighteners 143 and 144, re spectively, for maintaining the belt under proper tension. Platform 140 is supported on a slide 145 and guided for movement transverse of the brush receiving groove by guide bars 146 secured to the platform 140 by screws 147, which project into a groove 148 of the slide 145. Attached to the slide 145 in any suitable manner such as welding is a bracket 149 which receives the shank 150 of a spindle 151, threadedly received by the platform 140. The shank 150 of the spindle is held against longitudinal movement relative to bracket 149 by a collar 152 integral with the spindle and the boss 153 of a hand wheel 154 which is pinned to the shank 159 of spindle 151. It is obvious that upon rotation of the hand wheel 154 in either direction the platform 140 may be adjusted relative to the slide 145. Screws 140a threaded into the slide 145 and projecting through slots 141a in the platform lock the latter to the slide in adjusted position. Slide 145 comprises V-shaped surfaces 155 and 156 (see Figs. 6 and 8) which slide on tracks formed by corresponding surfaces 157 and 158, respectively, provided by the parallel legs 24 of he main bracket 21. The direction of movement of the slide 145 as determined by the tracks is also transverse to the brush receiving groove 40. Bars 24a attached to the legs or sidewalls 24 of main bracket 21 by screws 24b retain the slide 145 on the tracks. An antifriction roller 159 carried by a pin 160 secured to the slide 145 cooperates with a cam groove 161 of a cam disc 162 which is keyed as at 163 to earnshaft 57. Lock-nuts 164 threaded over a portion of the camshaft maintain the camwheel 162 adjacent the yoke 61 of the bracket 63. The cam action. of the camwheel 162 will be described later in connection with chart, but it is obvious that upon rotation of said cam wheel the slide 145 together with the platform 140 and the parts carried thereby will move transverse of the brush receiving groove and the drills will perform their operations.

Brush grooving mechanism D This mechanism is adapted to cut a groove D1 into a brush 35 (see Fig. 1)

It appears from Figs. 2, 4, and 5, that the double acting machine comprises two brush grooving mechanisms D which are exactly alike. It is therefore deemed suficient detailedly to describe only one of these mechanisms in connection with a common actuating mechanism.

Particularly referring to Figs. 2, 4, 5 and 6, two bearing brackets 170 and 171 which are attached to the main bracket 21 by screws 170a and 171a, respectively, carry vertical spindles 172 and 173 respectively, which rotatably support rotary cutter carrying brackets 174 and 175, respectively only one of which will be described presently. The rotary cutter carrying frame 174 mainly consists of a tubular member 176 journaled on the spindle 172 and resting against a collar 177 thereof, and a tubular boss 178 remote from the tubular member 176. This boss 178 is provided with combined annular and thrust bearings 179 which journal a saw carrying spindle 180. Endwise movement of the spindle 180 is prevented by a head 181 resting against the lower bearing 179 and a collar 182 threaded over the spindle and resting against the upper bearing 179. The boss 178 is closed at its lower end by a plug 183 which prevents lubricant within the boss from escaping. A washer 184 carries an annular packing 184a engaging the collar 182 and is held in the position overlying the upper bearing 179 by a grooved pulley 185 interposed. between the collar 182 and a rotary cutter 186 which is held in position by a nut 187 engaging the upper end of spindle 180. The frame 174 also comprises a flange portion 174a to which is attached by screws 165 and nuts 166 a plate 167 on which is mounted in any suitable manner an electric motor 168 which armature shaft 169 carries a grooved pulley 169a, and through a belt connection 188 drives the grooved pulley 185. A reduced portion 189 of the spindle 172 carries an arm 190 to which is attached a head pin 191 which supports a roller bearing 192 in turn rotatably supporting a grooved pulley 193. A spiral spring 194 surrounding the boss 195 of the arm 190' is anchored with one end to the tubular member 176 of frame 174 and with the other end to said boss 195. The spring when anchored with both ends is under compression and yields the arm 190 in a direction so that the grooved pulley 193 tightens the belt 138. Journaled on the tubular member 176 of bracket 174 is a long arm 196 which is held in position by collars 197 threaded over the lower end of said tubular member of the bracket 174. Lugs 196a receive bolts 197a which are locked in properly adjusted position by lock-nuts 198a and which engage the flanged portion 174a of bracket 174 from both sides. Arm 196 may be adjusted to any desired angular position relative to the bracket 174. A cam follower 198 is pivoted to the free end of arm 196, the corresponding arm 196 of the undescribed bracket 175 is also pivotally connected with said cam follower, which cooperates with a cam groove 199 provided by a cam wheel 200 which, as shown in Fig. 9, is keyed to the cam shaft 57. A nut 201 threaded over the extreme end of the camshaft maintains the camwheel 200 in engagement with a shoulder 202 of said camshaft. Rotation of camwheel 200 will result in a rocking or" the cutter carrying frames 174 and 175 so that the rotary cutters carried thereby may move through proper apertures in the yoke of the main bracket into operative engagement with the brushes in position a.

Mode of operation It will be presumed that the various cams on the cam shaft 57 which operate the various mechanism of the machine are in the position as shown in Fig. 8, prior to the starting of the ma chine. In order to start the machine various switches some of which are shown in Figs. 1 and 2 are thrown into closed position whereupon the various motors commence to run, and the camshaft commences to rotate.

The chart in Fig. 11 illustrates the timed relationship between the various mechanism of the machine during one complete revolution of the camshaft. The zero position of the camshaft in the chart corresponds with the position of the camshaft in Fig. 8. It willbe noticed from the chart in Fig. 11 that upon rotation of the gagement with the brushes in position a.

camshaft 57 the plungers 107 and 107a which prior to starting the machine were resting in the position shown in Fig. 8, are now moving into engagement with the brushes in the position a and slightly raise the same into operative engagement with the stampers 100 and 102a. This is effected by the tension of spring 122 during rotation of cam 118 through approximately the first revolution of the camshaft. As can be seen from the chart also, the ejector bars 39 remain in an advanced position until the plungers 107 and 10751 come to rest in an uppermost position. The drills as well as the saws are completely retracted from the brushes in position a during the first 25 revolution of the camshaft. The stamping operation is finished almost in stantly when the brushes are raised into operative engagement with the Stampers by the plungers, but the chart shows that these plungers maintain the brushes in position a in firm engagement with the stamper during the movement of the camshaft from 25 to 305 during which cycle of rotation the drilling operations as well as the grooving operations take place on the brushes in position a. It is therefore obvious that the plunge-rs 170 and 1700. have an additional function, to wit, to maintain the brushes in position a while the referred operations take place upon them. During rotation of the camshaft between 25 and 185 the camwheel 162 effects an advancing movement of the drills toward the brushes and approximately halfway therein. The ejector bars 39 will during such movement of the camshaft be retracted and reach a most retracted position after approximately 85 rotation of the camshaft from the 0 position.

During rotation of the camshaft between 105 and 145 carnwheel 200 will effect movement of the rotary cutters toward and into operative en- Concurrently with the advance of the cutters toward the brushes the drills which halfway entered these brushes are withdrawn into most retracted position again (see Fig. So) by the cam action of camwheel 162. This withdrawal of the drills after a part operation has various advantages one of which is to protect the comparatively fine drills which, if not retracted would very probably break in time due to the vibrations imparted to the brushes by the engaging saws, another advantage is the slow feeding speed for the drills operations performed on the brushes.

which may be adapted in vi w of the dividing of each drilling operation in two part operations which take place without interfering with other Slow feeding speed of a drill means little wear on the same and therefore require sharpening o the same after a comparatively long period of time. During the rotation of the camshaft between 145 and 185 the cam action of camwheel 200 is such that the rotary cutters are withdrawn from the brushes whil concurrently therewith the drills due to the cam action of cam wheel 162 move into the partly drilled brushes again and then continue drilling at a uniform feeding speed until the cam shaft reaches 265 from the original position at which time the drills have already finished the holes. The dividing of each drilling operation in two part operations has in addition to the advantages already stated the following one, the drills have ample time to cool off during the retracting and part advancing movement through the partly drilled holes. During rotation of the camshaft between 265 and 285 the cam action of the wheel 162 is such as rapidly to withdraw the drills from the position a. During rotation of the camshaft between 285 and 345 camplate '70 advances the ejector bars 39 in the direction of the arrows 44 and 45. During such an advancing movement of the ejector bars they first engage the brushes which immediately after the preceding movement of the ejector bar into most retracted position dropped into the groove 40, and push the same forwardly into position a. Camplate 118 effects retraction of the plungers 107 and 107a shortly before the pushed brushes engage and push forwardly the stationary rows of brushes in the groove 40. The chart shows that the ithdrawal of the plungers takes place during the rotation of the cam shaft between 305 and 325. Immediately upon reaching a most retracted position, the plungers commence to rise again under the action of spring 122 and lift the brushes which have just been pushed into position a into operative engagement with the stampers. The same sequence of operations takes place du ing each following complete revolution of the camshaft. fhe foremost finished workpiece: 350 are fin lly pushed into inclined chutes on which they slide or are removed by hand into proper receptacles. There is no certain original position in which the machine has to be started, this machine may be started in any position as can be 'eadily understood.

Referring to Figs. 2, 3 and 8 and 8a, a cover is secured to the main bracket 21 in any suitable manner and communicates with a suction pipe 211 adapted to convey the graphite dust which has been removed from the brushes by the drilling and grooving operations onto a suitable place remote As disclosed rrom the machine. in Fig. 3, a pipe 212 communicates with two hose 213 and 214 which terminate adjacent the drills or more particularly in position at in Fig. 8a.

Compressed air from any suitable source passes 0 through pipe 212 and hose 212 and 21 i and blows continuously against t e drilis and into the cover 210. After a completed drilling and grooving op-- eration and when the drills are completely retracted from the finished brushes, some of the compressed air will blow through the finished holes and grooves and through roove 40 and then through apertures in one side-wall of groove ii) into the cover 210 and up through pipe 211. The compressed air flowing in the just described path will naturally carry all the graphite dust along, and thus prevent clogging of various movable parts of the machine and especially of the ejector bars 39.

While the form of embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows:

1 A machine for stamping and drilling commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction, a reciprocable bar for moving the lowermost commutator brush in the chute onto the track thereby advancing the commutator brushes on the track step by step; a Stamper aligned with one of the commutator brushes while in an intermittent restin position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the Stamper in order to impress the marl: of the same on the commutator brush; a continuously rotating drill spindle movablelaterally of the trackand adapted to drill a hole through acommutator brush while in an intermittent resting position on the track; means for-reciprocating the bar; means for reciprocating the plunger; and means for reciprocating the drill spindle.

2. A machine for stamping and drilling commutator brushes comprising, in combination, .a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction, a reciprocable bar for moving the lowermost commutator brush in thechute onto the track thereby advancing the commutator brushes on the trackstep by step; a s.tamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger forefiectingrelative movement between the aligned commutator brush and the stamper. in order'to impress the mark of the same on the commutatorbrush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent restingposition on the track; means for reciprocating thebar; means for reciprocating the plunger; and means-actuated in response to the operation 'of the last saidqmeans for reciprocating the drill spindle.

3. A machine for stamping; and'drilling commutator brushes comprising, incombination, a chute having commutator brushes stored therein in prearranged order; a trackadapteol to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track thereby advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; areciprocable plunger for efiectingrelative movement between the aligned commutator brush and the stamper in order to impress the mark of the same-on the commutator brush; a continuously rotating drill spindle movable laterallyof the track, and adapted to drill a hole through'a commutator brush while, in an intermittent resting position on the track; means for reciprocating thexbar; meansactuated in response 1 to'the operation of the last said means forreciprocating the plunger; and means for reciprocating'the ,drillspindle.

4. A machine for stampingand drilling commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction, a reciprocable bar for moving the lowermost commutator brush in the chute onto the track thereby advancing the commutator brushes on the track step by stepya stamper aligned with one of commutator brushes while in an intermittent resting position on the track; a reciprocable pltmger for effecting relative movement'between the aligned commutator brush and the stamper in order to impress the 'mark of the same on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a com mutator brush while in an intermittentrresting position; means for reciprocating the bar; means actuated in response to the operation. of the last said means for reciprocating the plunger; and means actuated in response to the opin in prearranged order; a track adaptedto guide commutator brushes in a certain. direction; a reciprocable bar for moving the lowermost commutator brush in the chuteonto. the track thereby advancing the commutatorbrushes on the track step by step; meansfor reciprocating said .bar; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the, track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush; a mechanism for reciprocating the. plunger; a continuously rotating drill spindle movablelaterally of the trackv andadapted to drill a hole through a commutator brush while in an intermittent resting position on the. track;

means for reciprocating the drill spindle ;.,a cam shaft; a cam on said shaft foractuatingthe plunger reciprocating mechanism; .anothencam on said shaft, for-actuating the drill spindle, reciprocating means; and means, for. rotating the cam shaft througha predeterminedcyclewhile the bar is ineifective.

6. A machine for stamping and drilling commutator brushes comprising, in, combination. ,a

chute having commutator brushes stored therein in, prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermostlcommutator brush in the chute onto the track there- ,by advancing ,the commutator brusheson the track step by, step; a mechanismfor reciprocating said bar; a stamper aligned with one of the commutator. brushes while. in an intermittent resting position on o the, track; .a reciprocable plunger for effecting. relative movement between the aligned commutator brush and the stamper in order to impress the mark. of the stamper .on the connnutatorbrush; a mechanism for reciprocating the plunger; a continuously; rotatingldrill spindle movablelaterally of the track and adapted to drillla hole through a cormnutatorbrush while in an intermittent resting position on the track;

means, for, reciprocating the drill spindle acam I shaft; camson said shaft for actuating the bar reciprocating mechanism, the plunger reciprocatingmechanism and the drill spindle reciprocating .means;-and.means for rotating the cam shaft.

7., A machine for stamping, drillingand grooving commutator brushes. comprising; in combination, a chute havin commutatorbrushes stored therein in prearranged order; a track adapted .toguide commutator brushes in a certain direction; ,a reciprocable bar for moving the lowermost commutator brush in the chute onto: theltrack thereby alsoadvancingthe commutator brushes on the track step by step; a stamperaligned with one of the commutator brushes whileinian intermittent resting position on the track; areciproca-ble plunger for effecting relative. move- ..ment between the ali ned commutator brush and the stamper in order to impress the mark'of the stamper on the commutator brush;: a continuously rotating drill spindle movable laterally i of the track andadapted to drill a-hole through a commutator brush while in an intermittent rest- ,ing position on the track; a continuously rotating cutting tool projecting into the track and adapt- .ed to cut a groove-into the-commutator brushes thereon; means for reciprocating the bar; means for reciprocating the plunger; and means for reciprocating the drill spindle.

8. A machine for stamping, rilling and grooving commutator brushes comprising; in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a recipr cable bar for moving the lowermost commutator brush in the chute onto the track thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool projecting into the track and adapted to out a groove into the commutator brushes thereon; means for reciprocating the bar; means for reciprocating the plunger; and means actuated in response to the operation of the last said means for reciprocating the drill spindle.

9. A machine for stamping, drilling and grooving commutator brushes comprising; in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove into the same; means for reciprocating the bar, means for reciprocating the plunger, means actuated in response to the operation of the last said means for reciprocating the drill spindle; and means actuated in response to the operation of the last said means for bodily moving the rotary cutting tool.

10. A machine for stamping, drilling and grooving commutator br shes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove into the same; means for reciprocating the bar; means actuated in timed relationship with the withdrawal of the bar for reciprocating the plunger; means actuated in response to the operation of the last said means for reciprocating the drill-spindle; and means actuated also in response to the operation of the plunger reciprocating means for bodily moving the rotary cutting tool.

11. A machine for stamping, drilling and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar f 1' moving the lowermost commutator brush in the chute onto the track during an advancing movement or the bar thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the same on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove therein; means for reciprocating the bar; means actuated in response to the operation of the last said means for bodily moving the rotary cutting tool; means for reciprocating the plunger; and means actuated in response to the operation of the last said means for reciprocating the drill spindle.

12. A machine for stamping, drilling and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the track step by step; a stationary stamper aligned with one or" the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the same on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove therein; means for bodily moving the rotary cutting tool; means for reciprocating the bar; a cam shaft; cams on said shaft for actuating the cutting tool moving means and the bar reciprocating 7 means; m ans for rotating the shaft through a predetermined cycle; means for reciprocating the plunger; and means actuated in response to the operation of the last said means for reciprocating the drill spindle,

13. A machine i or stamping, drilling and grooving commutator brushes comprising, in combination, a chute having commutator brushesstored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for'moving the-lowermost commutator brush in the chute onto the track'during an advancing movement or the bar thereby also advancing the commutator brushes on the track step by step; a stamper alignedwith one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutatorbrush and the stamper in order to impress the mark of the stamper on the commutator brushya continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said "cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove therein; means for reciprocating the bar; means actuated in response to the operation of the last said means for bodily moving the rotary cutting tool; means for reciprocating the plunger; meansfor reciprocating the drill spindle; a camshaft; cams on said shaft for actuating the plunger reciprocating means and the drill-spindle reciprocat ng means; and means for rotating the camshaftthrough a predetermined cycle.

' 14. A machine for stamping, drilling and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lower most coil mutator brush in the chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the track step by step; a stamper aligned'with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush; a continuously rotating drill spindle movable laterally of the track adapted to drill-a holethrougha commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a. commutator brush on the track in order to cut a groove therein; means for reciprocating the bar; means actuated in response to the operation of the last said means for bodily moving the rotary cutting tool; means actuated in response to the operationof the bar reciprocating means for reciprocating the plunger; and meansalso actuated in response to the operation of the bar reciprocating means for reciprocating the drill spindle.

15. A machine for stamping, drilling and grooving commutator brushes, comprising 'in'combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide cornmutator brushes in a certain direction; a reciprocable bar formo'ving the lowermost commutator brush in the. chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the track step by step; astainper aligned with one of the commutator brushes while in an intermittent resting position on the track;

:a reciprocable plunger for eifecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drilla hole througha commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove therein; a mechanism for reciprocating the bane mechanism for bodily moving the rotary cutting tool; means for reciprocating the plunger; means for reciprocating the drill spindle; a power driven cam shaft; and cams on said shaft for actuating the bar reciprocating mechanism, the cutting tool moving mechanism, the plunger reciprocating means and the drill spindle reciprocating means.

16. A machine for stamping, drilling and groov- 7 ing commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain. direction; a reciprocablebar for moving the lowermost commutator brush in the chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the trackstep by step; a stamperaligned with one of the commutator brushes while in anintermittent resting position on the track; a reciprocable plunger forefiecting relative movement between the aligned commutator brush and the stamper in order to impress themark ofzthe staniper on the commutator brush; a continuously rotating drill spindle movable laterally of the track and adapted to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rot-ating cutting tool projecting into the track and adapted to cut a groove into the commutator brushes thereon; means for reciprocating the bar; a mechanism for reciprocating the plunger; means for reciprocating the drill spindle; a camshaft; cams on said shaft-for actuating the plunger reciprocating mechanism and the drill spindle reciprocating means; means for rotating the cam-shaft through a predetermined cycle while the bar is at rest.

17. A machine for stamping, drilling and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the 1 lowermost commutator brush the chute onto the track during an advancing movement of the bar thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting. relative movement between the aligned commutator brush and the stamper in order to impress the mark of the stamper on the commutator brush;

a continuously rotating drill. spindle movable laterally or" the track and adapted'todrill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool. projectin intothe track and adapted to cut agroove into the commutator brushes thereon; means for reciprocating the .bar;a mechanism for reciprocating the plunger; means for reciprocating the drill spindle; a power driven cam shaft; and cams on said 1w shaft for actuating the bar reciprocating means, the plunger reciprocating mechanism and the drill spindle reciprocating means.

18. A machine for stamping and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored there-- in in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the Stamper in order to impress the mark of the same on the commutator brush; a continuously rotating cutting tool projecting into the track and adapted to out a groove into the commutator brushes thereon; means for "eciprocating the bar; and means for reciprocating the plunger.

19. A machine for stamping and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a recip-- rocable plunger for effecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the on the commutator brush; a continuously rotating cutting tool projecting into the track and adapted to out a groove into the commutator brushes thereon; means for reciprocating the bar; and means actuated in response to operation of the last said means for reciprocating the plunger.

20. A machine for stamping and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush the chute onto the track during the advancing oi the bar, thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for eirecting relative movement between the aligned commutator brush and the stamper in order to impress the marl: of the same on the commutator brush; a continuously rotating cutting tocl projecting into the track and adapted to cut a groove into the commutator brushes thereon; means for reciprocating the bar; a mechanism for reciprocating the plunger; a power driven cam shaft; and cams on said shaft for actuating the bareciprocating means and the plunger reciprocating mechanism.

21. A machine for stamping and grorwin coinmutator brushes comprsing, in combination, chute having commutator brushes stored therin prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost CQIL- mutator brush in the chute onto the track during the advancing of the bar, thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one or the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for eifect ng relative movement between the aligned commutator brush and the stamper in order to impress the mark of the same on the commutator rush; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove into the same; means for reciprocating the bar; means for reciprocating the plunger; and means actuated in timed relationshipwith a retracting movement of the bar for reciprocating the cutting tool.

22. A machine for stamping and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track during the advancing of the bar, thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for eiiecting relative movement between the aligned commutator brush and the stamper in order to impress the mark of the same on the commutator brush; a continuously rotating cutting tool, s id cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove into the same; means for reciprocating the bar; means actuated in timed r lationship with a retracting movement of the bar for reciprocating the plunger; and means also actuated in timed relationship with a retracting movement of the bar for reciprocating the cutting tool.

23. A machine for stamping and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein; a track adapted to guide commutator brushes in a certain direction; a rcciprocable bar for moving the lowermost conmiutator brush in the chute onto the track during the advancing of the bar, thereby also advancing the commutator brushes on the track step by step; a stamper aligned with one of the commutator brushes while in an intermittent resting position on the track; a reciprocable plunger for effecting relative movement between the aligned commutator brush and the Stamper in order to impress the mark of the same on the commutator brush; a continuously rotating cutting tool, tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove into the same; means for reciprocating the bar; a mechanism for reciprocating the plunger; a device for reciprocating the cutting tool; a power-driven cam shaft; and cams on said shaft for actuating the bar reciprocating means, the plunger reciprocating mechanism and the cutting tool reciprocating device.

2%. A machine for drilling and grooving commutator brushes comprising, in combination, a chute having commutator brushes stored therein in prearranged order; a track adapted to guide commutator brushes in a certain direction; a reciprocable bar for moving the lowermost commutator brush in the chute onto the track during the advancing of the bar, thereby also advancing the commutator brushes on the track step by step; continuously rotating drill spindle movable laterally of the track and adapted said cutting to drill a hole through a commutator brush while in an intermittent resting position on the track; a continuously rotating cutting tool, said cutting tool being bodily movable into engagement with a commutator brush on the track in order to cut a groove therein; means for reciprocating the bar; means for reciprocating the drill spindle; and means actuated in timed relationship with a withdrawal of the drill spindle from a commutator brush for bodily moving the rotating cutting tool into engagement with a commutator brush.

25. A machine for drilling and grooving a commutator brush comprising, in combination, means for holding a commutator brush in operating position; a continuously rotated drill; a continuously rotated and bodily movable cutter; a mechanism for axially feeding the drill a certain distance into the commutator brush, then withdraw the same from the commutator brush, then axially feed the same entirely through the commutator brush and then withdraw the same from the commutator brush again; means for actuating the mechanism; and means operated in timed relationship with the first withdrawal of the drill from the commutator brush for bodily moving the cutter into operative engagement with the commutator brush, and operated in timed relationship with the second feeding movement of the drill for withdrawing the cutter from the commutator brush.

26. A machine for stamping and drilling a commutator brush comprising, in combination, a support for properly locating a commutator brush; a drill for drilling a hole in the commutator brush; means for rotating the drill; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper; and means for reciprocating the drill toward and away from the commutator brush.

27. A machine for stamping and grooving a commutator brush comprising, in combination, a support for properly locating a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper; a cutter adapted to cut a groove into the commutator brush; means for rotating the cutter; and means for bodily moving the cutter toward and away from the commutator brush.

28. A machine for drilling and grooving a commutator brush comprising, in combination; a support for properly locating a commutator brush; a drill for drilling a hole in the commutator brush; means for rotating the drill; means for reciprocating the drill toward and away from the commutator brush; a cutter for cutting a groove into the commutator brush; means for rotating the cutter; and means actuated in timed relationship with a withdrawal of the drill from the commutator brush for bodily moving the cutter toward the commutator brush.

29. A machine for stamping, drilling and grooving a commutator brush comprising, in combination, a support for properly locating a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper; a drill for drilling a hole in the commutator brush;

means for rotating the drill; means for reciprocating the drill toward and away from the commutator brush; a cutter for cutting a groove into the commutator brush; means for bodily moving the cutter toward and away from the commutator brush; and means for rotating the cutter.

30. A machine for stamping and drilling a commutator brush comprising, in combination, a support for properly locating a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper; a drill for drilling a hole into the commutator brush; means for rotating the drill; and means for reciprocating the drill toward and away from the commutator brush a plurality of times to complete the drilling of the hole.

31. A machine for drilling and grooving a commutator brush comprising, in combination, a support for properly locating a commutator brush; a drill for drilling a hole in th commutator brush; means for rotating the drill; means for reciprocating the drill toward and away from the commutator brush a plurality of times to complete the drilling of the hole; a cutter adapted to cut a groove into the commutator brush; means for rotating the cutter; and means for bodily moving the cutter toward and away from the commutator brush.

32. A machine for stamping, drilling and grooving a commutator brush comprising, in combination, a support for properly locating a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for efiecting relative movement between the commutator brush and the stamper; a drill for drilling a hole in the commutator brush; means for rotating the drill; means for reciprocating the drill toward and away from the commutator brush a plurality of times to complete the drilling of the hole; a cutter adapted to cut a groove into the commutator brush; means for rotating the cutter; and means for bodily moving the cutter toward and away from a commutator brush.

33. A machine for drilling and grooving a commutator brush comprising, in combination, a support for properly locating a commutator brush; a drill for drilling a hole in the commutator brush; means for rotating the drill; means for reciprocating the drill toward and away from the commutator brush a plurality of times to complete the drilling of the hole; a cutter adapted to cut a groove into the commutator brush; means for rotating the cutter; and means for bodily moving the cutter toward and away from the commutator brush between drilling operations.

34. A machine for stamping, drilling and grooving a commutator brush comprising, in combination, a support for properly locating a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper; a drill for drilling a hole in the commutator brush; means for rotating the drill; means for reciprocating the drill toward and away from the commutator brush a plurality of times to complete the drilling of the hole; a cutter adapted to cut a groove into the commutator brush; means for rotating the cutter; and means for bodily moving the cutter toward and away from the commutator brush between drilling operations.

35. A machine, for stamping and drilling a commutator brush comprising, in combination, means for supporting a commutator brush in op erating position; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper and for gripping the commutator brush in operating position; a drill for drilling a hole in the commutator brush; means for rotating the drill; and means for reciprocating the drill toward and away from the gripped commutator brush.

36. A machine for stamping and grooving a commutator brush comprising, in combination, means for supporting a commutator brush in operating position; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper and for gripping the commutator brush in operating position; a cutter for cutting a groove into the commutator brush; means forrotating the cutter; and means for bodily moving the cutter toward and away from the gripped commutator brush.

37. A machine for stamping, drilling and grooving a commutator brush comprising in combination, means for supporting a commutator brush in operating position; a stamper provided with an image which the commutator brush is to receive upon relative movement between the same and the stamper; means for effecting relative movement between the commutator brush and the stamper and for gripping the commutator brush in operating position; a drill for drilling a hole in the commutator brush; means for rotating the drill; means for reciprocating the drill toward and away from the gripped commutator brush; a cutter for cutting a groove into the commutator brush; means for rotating the cutter; and means for bodily moving the cutter toward and away from the gripped commutator brush.

38. A machine for stamping and drilling a commutator brush comprising, in combination, means for supporting a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the commutator brush in operating position and the stamper; a drill for drilling a hole in the commutator brush; means for rotating the drill; means for feeding a commutator brush into operating position on the supporting means; means for effecting relative movement between the commutator brush in operating position and the stamper and for gripping the commutator brush in operating position, and means for reciprocating the drill toward and away from the gripped commutator brush.

39. A machine for stamping and grooving a commutator brush comprising, in combination, means for supporting a commutator brush, a stamper provided with an image which the commutator brush is to receive upon relative movement between the commutator brush in operating position and the stamper; a cutter for cutting a groove into the commutator brush; means for rotating the cutter; means for feeding a commutator brush into operating position on the supporting means; means for effecting relative movement between the commutator brush in operating position and the stamper and for gripping the commutator brush in operating position; and means for bodily moving the cutter toward and away from the gripped commutator brush.

40. A machine for stamping drilling and grooving a commutator brush, comprising, in combination, means for supporting a commutator brush; a stamper provided with an image which the commutator brush is to receive upon relative movement between the commutator brush in operating position and the stamper; a drill for drilling a hole in the commutator brush; means for rotating the drill; a cutter for cutting a groove into the commutator brush; means for rotating the cutter; means for feeding a commutator brush into operating position on the supporting means;

means for eiTecting relative movement between the commutator brush in operating position and the stamper and for ripping the commutator brush in operating position; means for reciprocating the drill toward and away from the gripped commutator brush; and means for bodily moving the cutter toward and away from the gripped commutator brush.

41. A machine for stamping commutator brushes comprising, in combination, a plurality of supports for properly locating commutator brushes; a plurality of stampers each having an image which a commutator brush is to receive upon relative movement between the commutator brush and the stamper; a plurality of means each for effecting relative movement between a commutator brush and a stamper; a single means for actuating all of the last said means; and means for actuating said single means.

42. A machine for drilling and grooving commutator brushes comprising, in combination, a plurality of supports for properly locating commutator brushes; a plurality of drills for drilling holes in the commutator brushes; means for rotating the drills; means for each drill adapted to reciprocate the same toward and away from a commutator brush; a first single means for actuating all of the drill reciprocating means; a plurality of cutters for cutting grooves into the commutator brushes; means for rotating the cutters; means for each cutter adapted to reciprocate the same toward and away from commutator brush; a second single means for actuating all of the cutter reciprocating means; and means for actuating the first and the second single means.

43. A machine for stamping and drilling commutator brushes comprising, in combination, a

plurality of supports for properly locating commutator brushes; a plurality of stampers each having an image which a commutator brush is to receive upon relative movement between the commutator brush and the stamper; a plurality of means each for effecting relative movement between a commutator brush and a stamper; a first single means for actuating all of the last said means; a plurality of drills for drilling holes in the commutator brushes; means for rotating commutator brush and the stamper; a plurality of means each for effecting relative movement between a commutator brush and a stamper; a first single means for actuating all of the last said means; a plurality of cutters for cutting grooves into the commutator brushes; means for rotating the cutters; means for each cutter adapted to reciprocate the same toward and away from a commutator brush; a second single means for actuating all of the cutter reciprocating means; and means for actuating the first and the second single means.

45. A machine for stamping, drilling and grooving commutator brushes comprising, in combination, a plurality of supports for properly locating commutator brushes; a plurality of stampers each having an image which a commutator brush is to receive upon relative movement between the commutator brush and a stamper; a plurality of means each for effecting relative movement between a commutator brush and a stamper; a first single means for actuating all of the last said means; a plurality of drills for drilling holes in the commutator brushes; means for rotating the drills; means for each drill adapted to reciprocate the same toward and away from a commutator brush; a second single means for actuatin all of the drill reciprocating means; a plurality of cutters for cutting grooves into the commutator brushes; means for rotating the cutters; means for each cutter adapted to reciprocate the same toward and away from a commutator brush; a third single means for actuating all of the cutter reciprocating means; and means for actuating the first second and third single means.

46. A machine for drilling commutator brushes comprising, in combination, a plurality of means for supporting commutator brushes; a plurality of means each for feeding a commutator brush into operating position on a supporting means; a first single means for actuating all of said feeding means; a plurality of drills for drilling holes in the commutator brushes; means for rotating the drills; means for each drill adapted to reciprocate the same toward and away from a commutator brush in operating position; a second single means for actuating all of the drill reciprocating means; and means for actuating the first and second single means.

47. A machine for grooving commutator brushes comprising, in combination, a plurality of means for supporting commutator brushes; a plurality of means each for feeding a commutator brush into operating position on a supporting means; a first single means for actuating all of said feeding means; a plurality of cutters for cutting grooves into the commutator brushes; means for rotating the cutters; means for each cutter adapted to reciprocate the same toward and away from a commutator brush in operating position; a second single means for actuating all of the cutter reciprocating means; and means for actuating the first and the second single means.

48. A machine for stamping commutator brushes comprising in combination, a plurality of means for supporting commutator brushes; a plurality of means each for feeding a commutator brush into operating position on a supporting means; a first single means for actuating all of said feeding means; a plurality of stampers each having an image which a commutator brush is to receive upon relative movement between the commutator brush in operating position and a stamper; a plurality of means each for effecting relative movement between a commutator brush in operating position and a stamper; a second single means for actuating all of the last said means; and means for actuating the first and second single means.

49. A machine for drilling and grooving commutator brushes comprising, in combination, a plurality of means for supporting commutator brushes; a plurality of means each for feeding a commutator brush into operating position ona supporting means; a first single means for actuating all of said feeding means; a plurality of drills for drilling holes in the commutator brushes; means for rotating the drills; means for each drill adapted to reciprocate the same toward and away from a commutator brush in operating position; a second single means for actuating all of the drill reciprocating means; a plurality of cutters for cutting grooves into the commutator brushes; means for rotating the cutters; means for each cutter adapted to reciprocate the same toward and away from a commutator brush in operating position; a third single means for actuating all of said cutter reciprocating means; and means for actuating the position and the stamper; a plurality of means each for effecting relative movement between a commutator brush in operatingposition and a stamper; a second single means for actuating all of the last said means; a plurality of drills for drilling holes in the commutator brushes; means for rotating the drills; means for each drill adapted to reciprocate the same toward and away from a commutator brush in operating position; a third single means for actuating all of the drill reciprocating means; and means for actuating the first, second and third single means.

51. A machine for stamping and grooving commutator brushes comprising, in combination, a plurality of means for supporting commutator brushes; a plurality of means each for feeding a commutator brush into operating position on a supporting means; a first single means for actuating all of said feeding means; a plurality of stampers each having an image which a commutator brush is to receive upon relative movement between the commutator brush in operating position and a stamper; a plurality of means each for effecting relative movement between a commutator brush in operating position and a stamper; a second single means for actuating all of the last said means; a plurality of cutters for cutting grooves into the commutator brushes;

means for rotating the cutters; means for each cutter adapted to reciprocate the same toward and away from a commutator brush in operating position; a third single means for actuating all of the cutter reciprocating means; and means for actuating the first, second and third single means.

52. A machine for stamping, drilling and grooving commutator brushes comprising, in combination, a plurality of means for supporting commutator brushes; a plurality of means each 

